Researchers claim to have shown that the much-talked-about "mid-life crisis" doesn't actually exist.

The mid-life crisis is likely a myth, according to researchers from the University of Alberta.
While conventional wisdom has long held that happiness in adults forms a U-shaped regression that slopes downward as humans enter their twenties until they reach middle age, all such prior research has relied on cross-sectional studies. The latest determination, published in the journal Developmental Psychology, is based on data from two longitudinal studies. 
Sociologist Harvey Krahn, one of the authors, said, "I'm not trashing cross-sectional r